Bending roll



June 29 1926.

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J.S BEALL BENDING ROLL" Filed Oct. 8, 1924 5 sheets sheet 5 June 29 1926. v 1,590,491

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BENDI-NG norm.

nppncanoh filed October a, 1924. Serial. no. 742,385.

My invention relates to bending rolls wherein the same are used in forming cylindrical materials from sheets or bars, or the like and consists primarily of three rolls mounted in a frame support upon a base and adapted to being driven, and to having the center lines of the same changed in relation with each other. Further novelty resides in the fact that the center of the upper roll may be maintained at an equal or unequal distance from the center lines of each of the lower rolls,jand that the smaller of the two lower rolls has a larger diameter "at the center "and gradually tapers toward either end ofthat portion used for bending purposes. I have provided new and novel means for releasing the bearing from the outboard end of the upper roll; the same being accomplished by the application of a fluid under' pressu're within a cylinder for actuating a piston.

New and useful means have been provided for the raising and lowering of each of the lower rolls independently of the other, by power means, that accomplishes the work rapidly and efficiently. I have provided a machine that imparts uniform curvature to all parts of the material to be bent.

With these and incidental Objects in view the invention consists in certain novel features of construction and combination of parts, the essential "elements of which are set forth in the appended claims and a preferred form of embodiment of which is hereinafter shown with reference to the drawings which accompany and form -pa rt of this specification.

I attain these objects by the mechanism illustrated in the accompanying drawings, in which- Figure 1 is a side elevation of the 'assembled machine looking from the control lever side. 7

Fig. 2 is an end elevation of the driving end of the machine. 7

Fig. 3 is a sectional View taken on line 8 of Fig. 2-, looking in the direction indicated.

Fig. i is a sectional view taken on line 4'i of 3, looking in the direction indicated.

Fig. 5 is a sectional view taken on line 5 5 of Fig. 3' looking in the direction indicated.

Fig. 6 is a sectional view taken on line 66 of F ig. 1 looking in the direction indicated.

Fig. 7 is a sectional view of the central bearing support of the upper roll. I

Fig. 8 is an outboard end view of the assen bled machine. t l n Fig. 9 is a sectional View of the fluid opera-te'd cylinder located at the outboard end of the machine. t

Fig; 10 is 'a sectional View taken on line 101O of Fig. 1 looking in the direction indicated. v

Fig. 11 is a sectional view taken on line li -11 0f Fig. 3 looking in the direction indicated.-

Fig. 12 is a detached tapered r'oll. v 1

Like reference characters refer to like parts throughout the several yiews I have found that best results are obtained by usin a structural steel base 1, but I do not wisi to be limited to any particular form of construction, for the base for a cast frame may be equallywell used. Secured to the base and acting as a frame structure to which the superstructure and the operati'ng mechanism is secured are plate members 2 which may be secured to the base by bolting or riveting or welding.

I have illustrated four of these frame supports mounted upon the base, but do not wish to be limited to any specific number, as the numberwill depend upon the length of the rolls and the size and character of the materials to be formed upon the machine.

An electric power unit 3 serves to impart operating energy to. the machine, the same being mounted within the frame and having side View of the a control box 4 mounted in a convenient 10- cation tothe operator of the machine; Mountedupon the shaft 5 of the motor is a pinion 6 that is adapted to high speed use and that will carry the loads necessary in machines of this character. I have found the pinion of the silent operating type gives best results. The pinion 6 coacts with the gear 7 which is motmted upon the shaft 8 which is properly journaled within the frame structure. In machines of this character it is desirable that the rolls be driven in; either direction, this is accomplishedin drivingv the top, or superposed roll, by the following gear arrangement. Secured to the shaft is pinion 9 meshing with pinion 10 that 1s secured to the clutch hub on shaft 11. The shaft 11 is journaled within the frame struc ture, and has a clutch shifting mechanism 12 interposed between the shaft, that is clouble acting, in order that either end of the shaft may be driven. The driving end 13 serves to connect and disconnect the shaft 11 having the driving pinion 14 secured thereto which coacts with the gear 15 mounted upon shaft 16 which is also journaled within the frame structure.

Mounted upon the shaft 16 is the driving pinion 17 which meshes with the master gear 18 that is mounted upon the superposed roll 21 and serves to impart rotation to the same.

The roll 21 is journaled within the pillow block 20 at, or near the inboard end of the roll, and is adapted to being moved within the necessary limits to serve to adjust the location of the block to the ordinary requirements of the machine. Bearing 2O serves as the bearing for the central location of the roll shaft and is so constructed, as shown in section in Fig. 7, to permit of certain changes in the alignment of the superposed roller. The train of gearing just outlined tends to drive the roll 21 in one direction. When the roll is to be driven in the opposite direction, the clutch 13 is disengaged and the clutch 22 is engaged with the shaft end 11 which is in the same alignment with the shaft 11 and in fact is the same shaft having the clutches 13 and 22 attached thereto and one of which is out of engagement at all times when the shaft 11 is being driven. Pinion 23 is mounted upon the hub of the clutch 22 and is driven by the gear 24 being in mesh with the gear 25 which in turn meshes with the pinion 23. The gear 24 and the pinion 23 do not mesh with each other; this is best shown in the sectional drawing of Fig. 4. By driving the shaft 11 through the medium of an idler gear I rotate the shaft 11 in the opposite direction from that obtained in the previous drive just described and I therefore drive the roll 21. also in the opposite direction.

Disposed lengthwise of the machine, and below the top roll are two additional rolls 26 and 27, the same being adapted to in dependent drives for rotation in either direction and each adapted to being raised or lowered independent of the other. Each of these rolls has a roller support disposed between the ends and a bearing opposite the drive end, and both supports are adapted to being raised or lowered by power-driven screw means. Lever-manipulated, powerdriven clutches are adapted to impart rota tion, in either direction, to each of the rolls, as well as to raise, or lower, either of the supports for each roll. The distance of the longitudinal center lines of the lower rolls from the longitudinal center line of the up per roll is of an unequal distance, the object being to permit of the manipulation of the rolls to produce a true cylinder from the sheet, or plate, stock being bent, or rolled. One of the lower rolls has a larger diameter at a point located between the ends of the rolling surface than at the ends and tapers in a uniform manner from thepoint of largest diameter to the end of the rolling surface in either direct-ion. The roll is tapered for two reasons: first, for the purpose of strengthening the bending roll; second, to prevent the bellying of the material being rolled.

The superposed roller shaft 21 has a gear 28 thereon having specially constructed long teeth 29 for engagement with another gear 30 with equally long teeth 31. These gear teeth are made long to compensate for the movement of the roll in its up and down movement to compensate for the different thicknesses of material being rolled, or bent, and for the different curvatures to be imparted to the material as well. Mounted upon the roll shaft 26 is a second driving gear 33 adapted to coact with the idler pinion 34 mounted upon stub shaft 35 and mounted upon the roll shaft 27 is the gear 36 also adapted to coact with the idler 34. Thus as rotation is imparted to the superposed roll, rotation is also imparted to each of the lower rolls, so long as the gears 28 and 30 are in mesh with each other.

Located at a point between the end bearings of each of the lower rolls is an adjustable support yoke 37 adapted to being sunported upon the upper end of the screw 38 and having rollers 39 journaled therein and made to conform to the diameter of the roll to be supported. The screw 38 is fitted to the worm wheel 40 so that as the worm wheel is rotated, the screw is raised or lowered because the same is threaded through the hub of the worm wheel. The worm wheel is journaled within the bearing 41 and is held in place as a thrust hearing. The bearing 41 is secured to the frame structure by suitable fastenings 42. Mounted upon the shaft 43 is a worm screw 44 that coacts with, and imparts the operating force to drive the worm wheel.

It is desirable that each of the lower rolls be adapted to being raised, or lowered at the end opposite the driving end as well as being raised or lowered at a point be tween the driving end and the end opposite, each independent of the other, this is accomplished by transverse shafts having clutches secured thereto and adapted to being driven, indirectly from the power unit mounted upon the frame of the machine.

Shaft 45 is adapted to being driven from the main power unit mounted upon the ma chine through a train of gearing heretofore described and having clutch members 46 and 47 attached thereupon and adapted to being mg lever:

manipulated through the action. of the shift able member; 48: The gears 52 and. 531 are adapted to drivethe shaft 45 through the action of the: clutches 4&6 and'47; one set in one direction and the other set in the op or only such portion of the combined shaft may be driven as the operator may desire; The operation of these clutches determlnes which portion of the 'roll is-tobe raised, or

lowered. Since the raising, or lowering of roll" 37 is determined by the operator as:

above outlined it is'apparent that the manipulation of roll 27" is accomplishedwithout in any Way interfering: with the operation of either of the other rolls;

The independent drivingof the roll 26' is:

accomplished in much the samemanner as the'drive of. rotation: as applied to roll" 27 and is accomplished' by drive chain 57 beingdriven by chain" sprocket 58 secured to shaft 45'. Chain 57 coacts with sprocket 59 secured to clutch shaft 60. Shafts 60 and 61 are securedtogether by means of: clutches 62, 63 and 6% anyone of which may-be dis-- engaged by the manipulation of the operatworm wheels that cooperate with the worm wheels that are adapted 'tora-ise and lower therolls a-t the desired lo'cation'as heretofore described.

The outboard bearing 65 of the superosed roll- 21 isadapted to engagement and disengagement with the roll by power means. This is made necessary because of the fact that if cylinders and the like are being tonne-d", and the ends are closed the same may be removed fi'OHI- the rolls, only by shifting the same from the rolls in: an endwise movement. Many times the rolls: are under some pressure and theshifting of the hearing, which in the larger sizes, are of subsinnti'a'lweight takes substantial energy to accomplish the same. The bearing c's-isconnected bya link like structure to a barrel. bearing 66 that surrounds: the cylin den 67. Secured to the member 66 isastirrup member 68 that is secured to the piston rod 69 by suitable means. The piston rod passes through the cylinder liead76 liaving a packing gland surrounding; the same to insure a tight workable joint. Secured to the piston rod 69' isa: piston. member 71 that is" adapted? towork, Within the cylinder and to'havi ng energy applied to actuate the same. outboardend of themaclii'ne and ate con Secured to these shafts are the 756 is a two-way valve located at the venientposition. for the manipulationthere ofgby. the operatoroft the machine. A fluid? under pressure,fas-;Water or compressed air or other: suitable ope-rating medium, is con:- ducted to=thevalve through suitable piping from aisource-outside of: the machine. Leadingfrom the valveto the cylinder are pipes: 72 and-73 leading'into opposite endsofs the cylinder which is adapted to being-manipulatedi in: a reciprocatingmovement being ap-- plied to the piston within the cylinder... A sloping surface 77 is provided at the outboard end of the upper shaft to afiord. an easy engagement of the same withinv the bearing 65. The barrel section 662 of the arm. is adapted. to form a working fit about the'cylinder 67. In. order that the strain may be transferred: to the frame. of the machine directly instead. of being. carried upon: the cylinder. 67 directly, a; projection is provided; havinga pin. therein adapted to. engagement within a suitablebearing with.- inztheframe as shown in F ig- 9. When the bearing 65 is disengaged from the superposed; roller, the pin 74 becomes disengaged front the bearing within the frame, at which time: the arm 7 5. may be rotated about the barrel: support to. permit of the removal. of the rolled structure from. the machine.

The stub axle 35 isheldzin-position by the action of the link members 7.7 and 78 as: shown in Fig, 5..

lVhile the form of: mechanism herein shown. and: described is admirably. adapted" to. fulfill; the objects primarily stated, it is. to. be understood thatv it is not intended to. confine the invention: to the one form: OIEGHI- bodiment herein: shown and described} as it is. susceptible of: embodiment. in various formsall coming Within. the scope oi the; claims which. follow.

hat I. claim is? 1. In a machine of the class described," the combination of a longitudinal structural base, astructural framemounted upon: the base, journa-ls secu-reot within the frame, one upper and-two lower rolls adapted. to being revolved within the journals, power: driven means adapted' to. revolve said: ro11s, means for shifting each of the lower rolls, a bearing suppoitingthe outer end: of the: upper roll and adapted to be moved into and outv otrelation with: said roll, a. fluid pressure means to move said bearing into and out o'liv relation with said upper roll,.means permitting the rotation; of the bearing about a horizontal axis whenmoved. out of engagement with the upper roll, and means for trans-v mitting the strain, when the roll. is under pressure, from the bearing directly to. the trame support.

21 lira niachine-of-the class described,.th-e combination 0tv a frame structure, three rolls journallerl: therein, each roll? adapted to. being driven: in. either direction independent.

of the others, one roll superposed above the others, the distance of the center line of the upper roll from the center line of each of the lower rolls adapted to being changed, driven screw means for raising and lowering each of the lower rolls, means for centrally supporting each of the lower rolls while stationary and during the period of being raised or lowered, one of the lower rolls having a larger diameter between than at the ends of the rolling surface, and journals supporting each roll within the frame structure.

3. In a machine of the class described, the combination of a rigid frame structure, journaled bearings secured within the frame structure, an upper and two lower bending rolls adapted to being rotated within said journaled bearings, power means forrotating the rolls in either direction, screw driven means for changing the radial distance between the upper roll and each lower roll, a movable bearing supporting the end opposite the driven end of the upper roll, hydraulic means for engaging and disengaging said movable bearing with the upper roll, and means permitting the movable bearing to be rotated about a horizontal axis when so disengaged.

4. In a machine of the class described, the combination of three power driven bending rolls, one superposed above the other two, the center line of which is maintained at a predetermined distance from the center line of each of the lower rolls, amovable bearing supporting the upper roll opposite the driven end of said roll, hydraulic means for engaging and disengaging the movable bearing of the upper roll and said movable bearing adapted to being rotated about a horizontal axis parallel with the longitudina l axis of the upper roll when so disengaged.

5. In a machine of the class described, a fabricated structural base, a frame, one upper and two lower bending rolls journaled within said frame, a power unit mounted upon the base, a control switch adapted to regulate the power unit, gearing adapted to connect the power unit with each of the three bending rolls, means adapted to drive the bending rolls, selective manipulative means for raising or lowering either of the lower rolls, separate journaled bearings for each of the bending rolls, a movable bearing for the end opposite the driven end of the upper bending roll, and hydraulic. means for engaging and disengaging the movable bearing with the upper roll. 7

6. In a machine of the class described, the combination of a structural base, a frame, three bending rolls, one disposed above the other two, journaled bearings securing said bending rolls within the frame, selective manipulative means for driving each of said bending rolls, power driven screw means for raising and lowering. the lower bending rolls, roller supports superposed above the screw means and adapted to support the lowerbending rolls centrally the ends of their rolling surfaces, a movable outer bearing for the upper bending roll, hydraulic means for engaging and disengaging said movable outer bearing of the upper bending roll, means whereby the rollingpressure is transmitted from the movable outer bearing to the structural frame when engaged, and means for rotating the movable outer bearing about a longitudinal horizontal axis when disengaged from said upper bending roll.

7. In a machine of the class described, a

fabricated base, a frame, one upper and two lower bending rolls mounted in the frame, a power unit mounted upon the base, transmission means for connecting the power unit with the bending rolls, manipulative. means for rotating said bending rolls, selective means for raising and lowering either of the lower bending rolls, means for centrally supporting said rolls when raised .or lowered, said means comprising a screw, a yoke supported upon the upper end of said screw, a screw wheel and a worm screw mounted on a. driven shaft; a movable outboard bearing for the upper bending roll, and hydraulic means for engaging and disengaging the movable outboard bearing of the upper bending roll,-said means comprising a cylinder, a piston within the cylinder, and fluid pressure means; a yoke and apiston rod connecting the yoke to the piston.

8. In a machine of the class described, the combination of a superposed roll and two lower rolls, power means adapted to drive said rolls, a movable bearing adapted to support the superposed roll upon its end opposite the driven end, hydraulic means adapted to move the bearing into and out of relation with said roll, a journal whose central line is parallel with the longitudinal center line of the superposed roll, revolubly supporting said bearing; and means permitting the bearing to be rotated about said journal.

9. In a machine of the class described, the combination of one upper and two lower bending rolls, all adapted to be driven at one end, a movable bearing for the end opposite the driven end of the upper bending roll, a rotatable bearing support for said anovable bearing, means adapted to drive and to impart rotation to said bending rolls, a frame structure supporting the bending rolls; a hydraulic cylinder, a piston and piston rod adapted to the cylinder, a stirrup structure secured to said rotatable bearing support, said stirrup structure adapted to being actuated by the piston and piston rod, and a barrel like structure within the bearing support adapted to slidable relationship with and rotation about said hydraulic cylinder.

10. In a machine of the class described, a frame, a base, an upper and two lower rolls mounted in the frame, all adapted to be driven at one end, a bearing for the upper roll, means for raising and lowering each of the lower rolls, means for centrally supporting each of the lower rolls while stationary and during the period of being raised and lowered, said means comprising a driven worm, a worm wheel, a threaded screw coacting with the worm wheel and adapted to being raised and lowered thereby, a roll supporting yoke fitted to the upper end of the screw and means for supporting the worm wheel within the frame.

11. In a machine of the class described, a frame a base, an upper and two lower rolls mounted in the frame, all adapted to be driven at one end, a bearing for the upper roll, hydraulic means for engaging and disengaging the bearing from the end of the upper roll opposite its driven end, said. means comprising a cylinder, a piston within the cylinder, and fluid pressure means; a yoke, a piston rod connecting the yoke to the piston, means for transmitting rolling pres sure from the upper roll through its bearing and the yoke to the frame, means for raising and lowering each of the lower rolls, means for centrally supporting each of the lower rolls while stationary and during the period of being raised and lowered, said means comprising a driven worm, a worm wheel, a threaded screw coacting with the worm wheel and adapted to being raised and lowered thereby, a roll supporting yoke-fitted to the upper end of the screw, and means for supporting the worm wheel within the frame. 4

12. In a machine of the class described, a bending roll and a movable bearing therefor,

hydraulic means adapted to move said bearing out of engagement with said bending roll, and said movable hearing when so moved out of engagement, adapted to be r0- tated about a horizontal axis, whose longitudinal axial line is parallel to the longitudinal axial line of said bending roll.

13. In a machine of the class described, a combination of a structural base, a frame, three bending rolls, one disposed above the other two, journaled bearings securing said bending rolls within the frame, selective manipulative means for driving each of said bending rolls, power driven screw means for raising and lowering the lower bending rolls, roller supports superposed above the screw means and adapted to support th lower bending rolls centrally the ends of their rolling surfaces, a movable outer bearing for the upper bending roll, a fluid pressure means for engaging and disengaging said movable outer bearings of the upper bending roll, means whereby the rolling pressure is transmitted from the movable outer bearing to the structural frame when engaged, and means permitting the rotation of the movable outer bearing about a longitudinal horizontal axis when disengaged from said upper bending roll.

14. In a machine of the class described, the combination of a superposed roll and two lower rolls, power means adapted to drive said rolls, a movable bearing adapted to support the superposed roll upon its end opposite the driven end, a fluid pressure means adapted to move the bearing into and out of relation with said roll, a journal whose central line is parallel with the longitudinal center line of the superposed roll; revolubly supporting said bearing; and means permit: ting the bearing to be rotated about said journal.

JOHN S. BEALL. 

